User manual POLK AUDIO MM2154

[. . . ] State-of-the-art laser-based Klippel measurement technology perfectly centers the subwoofer's voice coil in the magnetic field, improving X-max and BL linearity, and the sub's micro and macro dynamics, for deep, precise, stomach-shaking and spine-wrenching bass. Optimized for high performance in small sealed enclosures but versatile enough to pound hard even in bandpass and vented enclosures--Flat, deep bass with great extension as only Polk/MOMO can do it. Built tough and backed by the best warranty in the car audio world: Three years parts and labor. Durable, airtight Rubber Surround for a long life of extended linear motion, optimized to achieve the longest throw possible for the cone: "Big cone, big throw! [. . . ] Since most people want more bass than a flat frequency response yields, tuning the cabinet at a lower frequency, say 50 Hz, would give you a gain of 12 dB per octave between 100 and 50 Hz and flat response from 50 Hz down. The larger the cabinet, the lower the resonant frequency, and the lower the efficiency. Two identical systems will sound very different in a Honda vs. The bigger the car the lower the frequency at which room gain begins. Tools You Will Need To Build Your Enclosure If you have decided to build your own enclosure for your Polk/MOMO subwoofers, here is a list of the tools you should have available to you. Parts You Will Need To Build Your Enclosure When building a subwoofer enclosure you will find that there are numerous materials recommended for construction. Particle board (the smaller the particles the better) These materials range in price as well as availability. Particle board is the most common, least costly, and can be purchased at most hardware stores. MDF and marine grade plywood, although preferable, are usually much harder to find, and much more costly. Whichever you choose, we recommend that its minimum thickness be 3/4". This will provide the rigidity necessary for optimum performance. If you've never built an enclosure before we are going to try to make this as easy and painless as possible. If you've built enclosures before you can skip this section and go right to the technical sheet to get your parameters. Wood (particle board, MDF, or marine grade plywood) 4' x 8' x 3/4" sheet 2. Terminal cup (one per speaker) available at electronic parts stores 6. Designing Your Polk/MOMO Subwoofer Enclosure Step By Step When designing your subwoofer enclosure, the first thing you need to figure out is, just how large an enclosure will fit in your vehicle. When an enclosure is going in the trunk of a car, you first need to measure your trunk to find the maximum height, width, and depth you can use. pay attention to trunk hinges and tension bars. If your enclosure is going in an area other than a trunk, make sure you check for similar obstructions. This compensates for the thickness of the material you use (simply double the thickness, i. : if you're using 3/4" material, subtract 1 1/2"; 1" material, subtract 2", etc), and will give you your usable (internal) dimensions. If you are using a single subwoofer, you can cut your width in half. [. . . ] To allow Polk Audio to offer the best possible warranty service, please register your new product online at: www. Com/registration or call Polk customer service 800-377-7655 in the USA and Canada (outside the USA: 410-358-3600) within ten (10) days of the date of original purchase. Be sure to keep your original purchase receipt. Defective Products must be shipped, together with proof of purchase, prepaid insured to the Polk Audio Authorized Dealer from whom you purchased the Product, or to the Factory at 2550 Britannia Boulevard, Suite A, San Diego, California 92154. [. . . ]